BANGOR, Maine — An unattended car parked in the driveway of an apartment building on Griffin Road rolled down the driveway, across the street, and into the front wall of another apartment building Monday afternoon.

“The vehicle was parked at 235 Griffin Road and was either left in neutral or slipped out of gear,” said Bangor police Lt. Tom Reagan, referring to the police report filed by officer David Olmstead.

The accident occurred around 4 p.m.

“[The car] slipped backward out of the driveway across the street to 250 Griffin Road and hit the house, causing significant damage to the side of the house,” said Reagan, who could not provide a specific cost estimate of the damage.

The apartment building is owned by Northside Family Housing.

“I would say it was a significant amount of property damage,” said Olmstead.

The registered owner of the car — a 2002 Buick sedan with an automatic transmission — is Jack Patrick, 66, of Bangor.

“The owner of the car was the last known operator,” Reagan said.

“We aren’t sure if the operator left it in neutral or if it somehow slipped out of gear,” said Olmstead. “When I spoke to him, he said he thought he might have left in neutral.”

Olmstead and Reagan said no charges are expected to result from the incident.